Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23d82945fb5e191…

MALICIOUS

PDF

185.6 KB Created: 2020-08-11 23:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 638d95a8e870d129b513327a79607edf SHA-1: 6ef93635cf4806f1d086af96e871a2bf2e8aa7c5 SHA-256: b23d82945fb5e191bf3ede974f4063c911350f81a988c64336e5967689f8044e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing indicating a malicious redirector link. The embedded URL, 'https://ttraff.com/pify?keyword=esc+valvular+heart+disease+guidelines+pdf', is identified as a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to medical guidelines, likely serving as a lure to encourage the user to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=esc+valvular+heart+disease+guidelines+pdf In PDF document text
    • http://files.aslteen.com/uploads/1/3/1/6/131606755/zuvozagabevofefomax.pdfIn PDF document text
    • http://files.matandnick.com/uploads/1/3/1/4/131407692/kikorupefufim.pdfIn PDF document text
    • http://biridipi.printer-graphics.com/uploads/1/3/1/4/131438464/9968606.pdfIn PDF document text
    • http://files.pbrcride.com/uploads/1/3/2/7/132740278/kepuragawabesak.pdfIn PDF document text
    • http://files.twistedtangerine.com/uploads/1/3/2/6/132682295/a23c91fe5c23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/16714512632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/bazojizikobotatiximume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/83602417129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/43272008667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1975/3879/files/blank_space_song_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/hybridization_of_carbon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/lowes._com_mylowes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/0973/1734/files/igor_bergler_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1787/0239/files/13404088914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7922/7805/files/62182703147.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27E76 5432 bytes
SHA-256: 4226a214e34f0bcd4d9696187d4e8446696f4bfa0cd6302a353f07e77c881034
font_01_sfnt_off000290f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x290F4 15656 bytes
SHA-256: 3e2a7e9822bce5d5f5a96475d8cbf4479b5d71d3244009b7d751a351f176f402
font_02_sfnt_off0002c263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C263 16148 bytes
SHA-256: 98bbda09e34957c2c47eea570891e411fa41ced272e9777bbef021ce7395b75a

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